[coreboot-gerrit] New patch to review for coreboot: util/crossgcc: Add option to bootstrap a host gcc

[Nico Huber]

Nico Huber ([e-mail]) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/13473

-gerrit

commit e8f4269e2d322174dbd769ae27bdd6b5141ddffc
Author: Nico Huber 
Date:   Tue Jan 26 16:10:17 2016 +0100

util/crossgcc: Add option to bootstrap a host gcc

Bootstrapping gcc is the recommended way if your host gcc's version
    doesn't match the gcc version you're going to build. While a build
    with an outdated host gcc usually succeeds, an outdated gnat seems
    to be a bigger issue.

Change-Id: Icb47d3e9dbafc55737fbc3ce62a084fb9d5f359a
    Signed-off-by: Nico Huber 
---
 util/crossgcc/Makefile |  3 ++-
 util/crossgcc/buildgcc | 38 +++++++++++++++++++++++++++++++++++---
 2 files changed, 37 insertions(+), 4 deletions(-)

diff --git a/util/crossgcc/Makefile b/util/crossgcc/Makefile
index 79e0c3c..4f5d919 100644
--- a/util/crossgcc/Makefile
+++ b/util/crossgcc/Makefile
@@ -25,7 +25,8 @@ build_tools: build_gcc build_iasl build_gdb

build_gcc:
    bash ./buildgcc -p $(BUILD_PLATFORM) $(if $(CPUS),-j $(CPUS)) $(if $(KEEP_SOURCES),-t) $(BUILDGCC_OPTIONS) \
-			$(if $(BUILD_LANGUAGES),-l $(BUILD_LANGUAGES))
+			$(if $(BUILD_LANGUAGES),-l $(BUILD_LANGUAGES)) \
+			$(if $(BUILD_BOOTSTRAP),-b) \

build_gdb:
 ifeq ($(SKIP_GDB),)
diff --git a/util/crossgcc/buildgcc b/util/crossgcc/buildgcc
index 5b7c45a..03007ae 100755
--- a/util/crossgcc/buildgcc
+++ b/util/crossgcc/buildgcc
@@ -19,7 +19,7 @@
 cd $(dirname $0)

CROSSGCC_DATE="January 26th, 2016"
-CROSSGCC_VERSION="1.35"
+CROSSGCC_VERSION="1.36"

# default settings
 PACKAGE=GCC
@@ -30,6 +30,7 @@ DESTDIR=
 CLEANHOST=0
 SAVETEMPS=0
 SKIPPYTHON=1
+BOOTSTRAP=0

# GCC toolchain version numbers
 GMP_VERSION=6.1.0
@@ -361,6 +362,8 @@ myhelp()
    printf "    [-P|--package <package>]      Build a specific package: GCC, CLANG, IASL, GDB\n"
    printf "                                  (defaults to $PACKAGE)\n"
    printf "GCC specific options:\n"
+	printf "    [-b|--bootstrap]              bootstrap the host compiler before building\n"
+	printf "                                  the cross compiler\n"
    printf "    [-p|--platform <platform>]    target platform to build cross compiler for\n"
    printf "                                  (defaults to $TARGETARCH)\n"
    printf "    [-l|--languages <languages>]  comma separated list of target languages\n"
@@ -461,8 +464,24 @@ build_BINUTILS() {
    $MAKE install DESTDIR=$DESTDIR || touch .failed
 }

+build_host_GCC() {
+	CC="$CC" CFLAGS_FOR_TARGET="-O2" BOOT_CFLAGS="-O2" \
+		../gcc-${GCC_VERSION}/configure \
+		--prefix=$2 --libexecdir=$2/lib \
+		--enable-bootstrap \
+		--disable-werror --disable-nls \
+		--disable-libssp --disable-libquadmath \
+		${GCC_OPTIONS} --enable-languages="${LANGUAGES}" \
+		--with-gmp=$DESTDIR$2 --with-mpfr=$DESTDIR$2 \
+		--with-mpc=$DESTDIR$2 --with-libelf=$DESTDIR$2 \
+		--with-pkgversion="coreboot toolchain host bootstrap v$CROSSGCC_VERSION $CROSSGCC_DATE" \
+		&& \
+	$MAKE $JOBS CFLAGS_FOR_BUILD="-O2" BOOT_CFLAGS="-O2" bootstrap && \
+	$MAKE install DESTDIR=$DESTDIR && \
+	ln -s gcc $DESTDIR$2/bin/cc || touch .failed
+}

-build_GCC() {
+build_target_GCC() {
    # GCC does not honor HOSTCFLAGS at all. CFLAGS are used for
    # both target and host object files.
    # There's a work-around called CFLAGS_FOR_BUILD and CFLAGS_FOR_TARGET
@@ -489,6 +508,14 @@ build_GCC() {
    fi
 }

+build_GCC() {
+	if echo $1 | grep -q '^host-' >/dev/null 2>&1; then
+		build_host_GCC $@
+	else
+		build_target_GCC $@
+	fi
+}
+
 build_EXPAT() {
    CC="$CC" CFLAGS="$HOSTCFLAGS" ../${EXPAT_DIR}/configure --disable-shared \
    	--prefix=$2 --target=${TARGETARCH} || touch .failed
@@ -605,6 +632,7 @@ while true ; do
    	-r|--cleanhost)	shift; CLEANHOST=1;;
    	-t|--savetemps)	shift; SAVETEMPS=1;;
    	-d|--directory)	shift; TARGETDIR="$1"; shift;;
+		-b|--bootstrap) shift; BOOTSTRAP=1;;
    	-p|--platform)	shift; TARGETARCH="$1"; shift;;
    	-l|--languages)	shift; LANGUAGES="$1"; shift;;
    	-D|--destdir)	shift; DESTDIR="$1"; shift;;
@@ -647,7 +675,11 @@ case "$PACKAGE" in
    GCC|gcc)
    	echo "Target architecture is now $TARGETARCH"
    	NAME="${TARGETARCH} cross GCC"
-		PACKAGES="host-GMP host-MPFR host-MPC host-LIBELF BINUTILS GCC"
+		if [ $BOOTSTRAP -eq 1 ]; then
+			PACKAGES="host-GMP host-MPFR host-MPC host-LIBELF host-GCC BINUTILS GCC"
+		else
+			PACKAGES="host-GMP host-MPFR host-MPC host-LIBELF BINUTILS GCC"
+		fi
    	;;
    GDB|gdb)
    	NAME="${TARGETARCH} cross GDB"